JP5068445B2 - Elevator door equipment - Google Patents

Description

  The present invention relates to an elevator door device that opens and closes a car doorway provided in a car and a hall doorway provided in a hall.

  In a conventional elevator door safety device, a plurality of light projecting portions are provided on one vertical column of a car doorway, and a plurality of light receiving portions are provided on the other vertical column. When the passenger approaches the car door during the door opening operation and the light beam is interrupted, an announcement for alerting the passenger is broadcast. This prevents a passenger's finger or the like from being drawn into the gap between the vertical column and the car door. In addition, the detection beam is always projected from the projector, but the light reception result at the light receiving unit is invalid when the door is not open (when the door is closed, when the door is open, or when the door is closed). (For example, refer to Patent Document 1).

Japanese Patent Laid-Open No. 8-40677

  In the conventional elevator door safety device as described above, since the detection light beam is always projected even when it is not detected, the detection light beam may be received by another sensor due to interference or the like, which may cause a malfunction. For example, landing doors and car doors are often equipped with sensors that detect passengers at the entrance and exit during the door closing operation, but depending on the cost and the nature of the light, the frequency of the detection light used for the sensors is all It is easy to be in the same area, and the possibility of malfunctioning increases.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an elevator door device that can prevent malfunction of other sensors due to interference of a detection beam from a projector. .

  An elevator door device according to the present invention includes a door body that opens and closes an entrance to and exit from a car and a landing, a projector that projects a detection beam to the entrance, a light receiver that receives a detection beam from the projector, and a door closing operation In addition, an obstacle at the entrance / exit is detected by detecting the blocking of the detection light beam, and a door control unit is provided for blocking the detection light beam from the projector during the door opening operation.

  The elevator door device according to the present invention detects an obstacle at the entrance / exit by detecting the blocking of the detection beam during the door closing operation, and blocks the projection of the detection beam from the projector during the door opening operation. Thus, it is possible to prevent malfunction of other sensors due to interference of the detection light beam.

The best mode for carrying out the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a front view showing an elevator car door apparatus according to Embodiment 1 of the present invention. In the figure, a girder 1 is fixed to the upper part of the car doorway. A door rail 2 is fixed to the beam 1 horizontally.

  First and second car door bodies 3a and 3b that open and close the car doorway are suspended from the door rail 2. Each car door main body 3 a, 3 b has a door panel 4 and a door hanger 5 that is fixed to the upper part of the door panel 4 and engages with the door rail 2. Each door hanger 5 has a pair of hanger rollers 6 that roll along the door rail 2.

  The first and second pulleys 7 and 8 are provided in the beam 1 at intervals in the width direction of the car doorway. An endless belt 9 is wound between the first and second pulleys 7 and 8. Each door hanger 5 is connected to the belt 9 via the couplers 10 and 11. On the girder 1, a door motor 12 for driving the car door main bodies 3a and 3b is mounted. The driving force of the door motor 12 is transmitted to the first pulley 7 via the transmission mechanism 13. By rotating the first pulley 7, the belt 9 is circulated and the car door bodies 3a and 3b are moved in opposite directions.

  FIG. 2 is a plan view showing a main part of the door device of FIG. A pair of car vertical columns 14a and 14b are provided on both sides of the car doorway. A pair of landing columns 15a and 15b are provided on both sides of the landing doorway. The landing doorway is opened and closed by the first and second landing door bodies 16a and 16b. The landing door bodies 16a and 16b are opened and closed together with the car door bodies 3a and 3b by engaging with the car door bodies 3a and 3b when the car is landed.

  A first photoelectric sensor device (anti-pinch sensor device) 17 is mounted on the car door main bodies 3a and 3b. The first photoelectric sensor device 17 includes a first projector 18 attached to the lower part of the first car door body 3a, a first light receiver 19 attached to the lower part of the second car door body 3b, and a second It has the 2nd light projector 20 attached to the car door main body 3b upper part, and the 2nd light receiver 21 attached to the 1st car door main body 3a upper part. The first photoelectric sensor device 17 is disposed between the car door main bodies 3a and 3b and the landing door main bodies 16a and 16b.

  The first projector 18 projects the detection light beam horizontally. The first light receiver 19 is disposed so as to face the first projector 18 and receives the detection light beam projected from the first projector 18. The second projector 20 projects the detection light beam horizontally. The second light receiver 21 is disposed to face the second projector 20 and receives the detection light beam projected from the second projector 20. The light projecting directions of the detection light beams from the first light projector 18 and the second light projector 20 are reversed in order to avoid interference between the detection light beams of both.

  A second photoelectric sensor device (retraction prevention sensor device) 22 is attached to the car vertical columns 14a and 14b. The second photoelectric sensor device 22 includes a third light projector 23 attached to the car vertical column 14b and a third light receiver 24 attached to the car vertical column 14a. The second photoelectric sensor device 22 is arranged between the car vertical columns 14a and 14b and the car door main bodies 3a and 3b.

  The third projector 23 projects a plurality of detection light beams horizontally. The third light receiver 24 is disposed to face the third projector 23 and receives the detection light beam projected from the third projector 23.

  FIG. 3 is a front view showing an arrangement state of the first and second photoelectric sensor devices 17 and 22 of FIG. The projectors 18 and 20 between the landing door and the car door are projected at a height above and below, and the projector 23 between the car door and the car vertical column is arranged in the middle from the lower part of the car entrance. Multiple detection beams are projected.

  FIG. 4 is a block diagram showing a control system of the door device of FIG. The door motor 12 is supplied with power from the power source 25 via the power circuit 26. The power circuit 26 receives the gate signal generated by the gate signal generation circuit 27. The power circuit 26 is PWM (Pulse Width Modulation) controlled based on the gate signal. The door motor 12 is provided with a pulse encoder 28 that generates a signal corresponding to the rotation of the door motor 12.

  Opening and closing of the car door main bodies 3a and 3b is controlled by a door control circuit 29 which is a door control unit. That is, the door motor 12 is controlled by the door control circuit 29 via the gate signal generation circuit 27 and the power circuit 26. The door control circuit 29 includes a pulse count unit 30, a CPU (arithmetic processing unit) 31, a ROM (storage unit) 32, a RAM (storage unit) 33, an input / output port 34, and a PWM unit 35.

  The pulse count unit 30 counts the output pulses from the pulse encoder 28. CPU31 performs the calculation process of a door control program based on an external input signal. The ROM 32 stores a door control program and data. In the RAM 33, processing data, learning data, and the like are recorded.

  The input / output port 34 inputs an external signal and outputs an external signal. The input / output port 34 is connected to the first to third projectors 18, 20, 23 and the first to third light receivers 19, 21, 24. The PWM unit 35 sends a PWM signal to the gate signal generation circuit 27. The gate signal generation circuit 27 generates a gate signal based on the PWM signal.

  The door control circuit 29 detects an obstruction (passenger, luggage, carriage, etc.) at the entrance / exit by detecting the blocking of the detection light beam from at least one of the first and second projectors 18 and 20 during the door closing operation. ) Is detected. When an obstacle at the doorway is detected during the door closing operation, the door control circuit 29 opens the door bodies 3a, 3b, 16a, and 16b in the inverted door. Further, the door control circuit 29 blocks the detection light beams from the first and second projectors 18 and 20 during the door opening operation.

  Furthermore, the door control circuit 29 detects an obstacle in the vicinity of the car door main bodies 3a and 3b by detecting the blocking of the detection light beam from the third projector 23 during the door opening operation. When an obstacle in the vicinity of the car door main bodies 3a and 3b is detected during the door opening operation, the door control circuit 29 temporarily stops the door opening operation and instructs the passenger to leave the car door main bodies 3a and 3b. Are broadcast by an in-car announcement device (not shown). Further, the door control circuit 29 blocks the detection light beam from the third projector 23 during the door closing operation.

  FIG. 5 is a flowchart showing the control operation of the first and second photoelectric sensor devices 17 and 22 by the door control circuit 29 of FIG. The door control circuit 29 monitors whether the door main bodies 3a, 3b, 16a, 16b are in the door opening operation (step S1). If the door is not being opened, the first and second light projectors 18 and 20 project the detection light beam (step S2). If the door-opening operation is being performed, light projection by the first and second light projectors 18 and 20 is blocked, and the detection function of the first photoelectric sensor device 17 is disabled (steps S3 and S4).

  Further, the door control circuit 29 monitors whether or not the door main bodies 3a, 3b, 16a, 16b are in a door closing operation (step S5). If the door is not being closed, the third light projector 23 projects a detection light beam (step S6). If the door closing operation is being performed, light projection by the third projector 23 is blocked and the detection function of the second photoelectric sensor device 22 is disabled (steps S7 and S8).

  According to such a door device, since the light projection by the first and second light projectors 18 and 20 is blocked during the door opening operation, the first photoelectric sensor device 22 detects the obstacle when the obstacle is detected. In addition, it is possible to prevent a malfunction due to interference of detection light beams from the second projectors 18 and 20. Similarly, since the light projection by the third projector 23 is blocked during the door closing operation, a malfunction due to the interference of the detection light beam from the third projector 23 when the obstacle is detected by the first photoelectric sensor device 17. Can be prevented. Moreover, when photoelectric sensors other than the 1st and 2nd photoelectric sensor apparatuses 17 and 22 are arrange | positioned in the vicinity of a door apparatus, the malfunctioning of the photoelectric sensor apparatus can also be prevented.

Embodiment 2. FIG.
Next, FIG. 6 is a flowchart showing the control operation of the door control circuit according to the second embodiment of the present invention, and the configuration of the entire door device is the same as that of the first embodiment. In the second embodiment, the door control circuit 29 determines whether the door main bodies 3a, 3b, 16a, 16b are in the door closing operation (step S5) and the positions of the door main bodies 3a, 3b, 16a, 16b are set in advance. Whether it is within the range (step S9). For example, the setting range is set as shown in FIG. In the example of FIG. 7, the set range is from the position of the predetermined door opening to the fully open position.

  When the door closing operation is not being performed and the door main bodies 3a, 3b, 16a, and 16b are out of the setting range, the third light projector 23 projects a detection light beam (step S6). That is, the detection light beam from the third projector 23 is projected when all the doors are closed and when the door bodies 3a, 3b, 16a, and 16b are outside the set range during the door opening operation. At other times, that is, when the door is closed, when the door is fully open, and when the door main body 3a, 3b, 16a, 16b is within the set range, light projection by the third projector 23 is prevented. At the same time, the detection function of the second photoelectric sensor device 22 is disabled (steps S7 and S8).

According to such a door device, even when the door is open, when the door bodies 3a, 3b, 16a, and 16b are within a preset range, the detection light beam from the third projector 23 is prevented from being projected. Therefore, malfunction of other photoelectric sensor devices can be prevented more reliably.
Also, if an obstacle in the vicinity of the car door body 3a, 3b is detected immediately before the door is opened or in the early stage of the door opening operation, a warning is given by an announcement. After the risk of being drawn is reduced and the door bodies 3a, 3b, 16a, 16b are opened to some extent, the passenger can recognize the door opening operation, so there is no problem even if the detection function by the second photoelectric sensor device 22 is disabled. It is not considered.

In the second embodiment, the light projection from the third projector 23 during the door opening operation is blocked according to the positions of the door main bodies 3a, 3b, 16a, 16b, but depending on the time from the start of the door opening operation. Thus, the projection from the third projector 23 may be blocked.
In the second embodiment, the light projection from the third projector 23 during the door opening operation is blocked according to the positions of the door bodies 3a, 3b, 16a, 16b. You may block the light projection from the 2 light projectors 18 and 20 according to the position from the door main body 3a, 3b, 16a, 16b and the time from a door operation start.
Further, the timing for blocking the light projection from the first to third projectors 18, 20, and 23 can be set as appropriate in addition to the above. For example, it is possible to appropriately set whether to project the detection light beam from the first to third projectors 18, 20, and 23 or to block the projection when the door is in the fully open state and the fully closed state.
Furthermore, in the above example, the second photoelectric sensor device 22 is arranged between the car door main bodies 3a, 3b and the car vertical columns 14a, 14b, but the landing door main bodies 16a, 16b and the landing vertical columns 15a are arranged. , 15b, the present invention can also be applied to the case where a second photoelectric sensor device, that is, a pull-in prevention sensor device, is arranged.

It is a front view which shows the elevator car door apparatus by Embodiment 1 of this invention. It is a top view which shows the principal part of the door apparatus of FIG. It is a front view which shows the arrangement | positioning state of the 1st and 2nd photoelectric sensor apparatus of FIG. It is a block diagram which shows the control system of the door apparatus of FIG. It is a flowchart which shows the control action of the 1st and 2nd photoelectric sensor apparatus by the door control circuit of FIG. It is a flowchart which shows the control action of the door control circuit by Embodiment 2 of this invention. FIG. 10 is an explanatory diagram illustrating an example of a setting range in the door control circuit according to the second embodiment.

Explanation of symbols

  3a 1st car door body, 3b 2nd car door body, 16a 1st landing door body, 16b 2nd landing door body, 18 1st light projector, 19 1st light receiver, 20 2nd light projector , 21 2nd light receiver, 23 3rd light projector, 24 3rd light receiver, 29 Door control circuit (door control part).

Claims (3)

A door body that opens and closes the doorway between the car and the landing,
And searchlights for projecting detection light to the entrance, the first and second photoelectric sensor device each having a light receiver for receiving the detection light from the projector, and the door closing operation, the first photoelectric While detecting the obstacle of the entrance / exit by detecting blocking of the detection light beam of the sensor device, the detection light beam from the projector of the second photoelectric sensor device is blocked, and during the door opening operation , A door that detects an obstacle in the vicinity of the door main body by detecting blocking of the detection light beam of the second photoelectric sensor device, and that blocks the detection light beam from the light projector of the first photoelectric sensor device. An elevator door device comprising a control unit. The door control unit prevents the detection light from being projected from the light projector of the first photoelectric sensor device when the door body is in a preset range even during the door closing operation. The elevator door device according to claim 1. The door control unit prevents the detection light beam from being projected from the light projector of the second photoelectric sensor device when the door body is in a preset range even during the door opening operation. The elevator door device according to claim 1 .

Images